If the write protect pad of the controller is not connected to the writeprotect pin of the slot, the driver should be notified of this conditionso that incorrect check for write protection by reading the WRTORTregister can avoided. The get_ro platform callback can be used for insuch cases, but with device tree support enabled, such platform callbackscannot be supported.

Add a new quirk for notifying the driver about the missing write protectline so the driver can assume that the card write protection is disabled.